Damper for a spinning or twining spindle sleeve having a deformable damping element



Dec. 12, 1961 w. STAHEL 3,012,395

DAMPER FOR A SPINNING OR TWINING SPINDLE SLEEVE HAVING A DEFORMABLEDAMPING ELEMENT Filed July 25, 1960 2 Sheets-Sheet 1 mvsnroR u//.rclesmmsz.

Dec. 12, 1961 w. sTAHEl. 3,012,395

DAMPER FOR A SPINNING OR TWINING SPINDLE SLEEVE HAVING A DEFORMABLEDAMPING ELEMENT Filed July 25, 1960 2 Sheets-Sheet 2 Fig.2

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It is another object of the invention to provide a damper of the kindreferred to which establishes an accurately centered guidance of thespindle sleeve with simple, inexpensive means, lending themselves to bereadily produced and tted.

With these and other objects in view which will become apparent laterfrom this specification and the accompanying drawings, I provide adamper for a spinning or twining spindle, comprising in combination: astationary casing in operation filled with oil, a sleeve resilientlymounted in the said casing, rotary spindle journalled in the saidsleeve, and a strip-shaped damping element 4having a stepped developmentand when coiled about the said sleeve within the said casing co-axiallycontacting with the innermost step the said sleeve and with theoutermost step the inner surface of the said casing, consecutive stepsof the said damping element co-axially contacting one another.

Preferably the said strip-shaped damping element has excrescences on oneof its faces, which excrescences bear on the adjacent smooth co-axialsurface.

These and other features of my said invention will be clearly understoodfrom the following description of a preferred embodiment thereof, givenby way of example with reference to the accompanying drawings, in which:

FIG. l is a longitudinal section of a spinning or twining spindle.

FIG. 2 is a cross section on the line A-A, on a larger scale.

FIG. 3 is a development of the damping element.

FIG. 4 is a plan view of the same damping element.

The case 1 is xed to the spindle frame 3 by means of a shoulder 2 and anut 4. The spindle shank 5 rests with its tip 6 on a foot bearing 7,which is fixed in the spindle sleeve 8. Between the spindle sleeve 8 andthe casing 1 the damping element 9 is inserted, which is illustrateddiagrammatically in FIG. l, and is held between a resilient washer 10and a cut-up circular clip 11.

The damping element 9 (see FIGS. 2 to 4) comprises four steps,corresponding to four windings about the spindle sleeve. Since thelength of each step is slightly smaller than the circumference of thecorresponding coil,

2 V each step has an laccurately 'circular cross section. The'plate-shaped damping element is provided at one side with Warts, ribs orother suitable excrescences 12, which in the coiled condition beareither on the 'rear `face of the next step or against the inner surfaceof the casing wall. The damping element 9 is conveniently made ofsynthetic rubber or any other deformable oil-resistant substance, suchas a synthetic plastic material.

The interstice between the spindle and the casing is filled up toslightly beyond the height of the damping element with an oil which inthe known manner communicates with the bearing chamber in the interiorof the spindle sleeve through the foot bearing of the spindle.

Owing to the centered journalling of the spindle sleeve within the firststep of the coiled damping element, as shown in FIG. 2, the forcesreacting against a radial deviation of the spindle sleeve are equal inevery direction. When owing to unbalance of the yarn bobbin or owing tothe occurrence of any kind whatever of a force the spindle sleeve isradially displaced, it compresses the warts or ribs of the dampingstrip, thereby knarrows the cavities formed by these warts or ribs andforces the oil towards the cavities on the other side, which owing tothe same occurrence have been enlarged. The behaviour of the dampingstrip described thus combines a resilient taking of the forces with amotion damping displacement of the bulk of the oil.

While I have herein described and illustrated in the accompanyingdrawings what may be considered a typical and particularly advantageousembodiment of my said invention I wish it to be understood that I do notlimit myself to the particular details and dimensions described andillustrated; for obvious modications will occur to a person skilled inthe art.

What I claim as my invention and desire to secure by Letters Patent, is:y

l. A damper for a spinning or twining spindle, comprising incombination: a stationary casing in operation filled with oil, a sleeveresiliently mounted in the said casing, a rotary spindle journalled inthe said sleeve, and a stripshaped damping element having a steppeddevelopment and when coiled about the said sleeve within the said casingco-axially contacting with the innermost step the said sleeve and withthe outermost step the inner surface of the said casing, consecutivesteps of the said damping element co-axially contacting one another.

2. A damper as claimed in claim l, wherein the said strip-shaped dampingelement has excrescences on one of its faces, which excrescences bear onthe adjacent smooth co-axial surface.

References Cited in the le of this patent UNITED STATES PATENTS2,387,260 Hargreaves et al Oct. 2,3, 1945

